Uninterruptible power supply



FIG. 1 is a perspective view of an uninterruptible power supply, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a back elevational view thereof.

The broken lines shown in the drawings are for the purpose of illustrating portions of the uninterruptible power supply that form no part of the claimed design. 

CLAIM The ornamental design for an uninterruptible power supply, as shown and described. 